Angular anisotropy parameters and recoil-ion momentum distribution in two-photon double ionization of helium
نویسندگان
چکیده
We present convergent-close-coupling CCC calculations of the angular anisotropy parameters 2 , 4 and the recoil ion momentum distribution d /dp in two-photon double ionization TPDI of helium. In a stark contrast to single-photon double ionization SPDI , where the 2 parameter varies widely changing the angular distribution from isotropic to nearly dipole for slow and fast photoelectrons, respectively, the parameters for TPDI show very little change. The angular distribution of the recoil ion is fairly isotropic in TPDI as opposed to a strong alignment with the polarization of light in SPDI.
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